Finding the Fourth Proportional to 17,100.16, 25,659.98 and 13,659.28

Step by Step Solution

1. Step 1: Write the proportion equation
   17,100.16 : 25,659.98 = 13,659.28 : x
2. Step 2: Convert to fraction form
   17,100.16/25,659.98 = 13,659.28/x
3. Step 3: Cross multiply
   17,100.16x = 25,659.98 × 13,659.28
4. Step 4: Simplify right side
   17,100.16x = 350,496,851.61
5. Step 5: Solve for x
   x = 350,496,851.61/17,100.16
6. Step 6: Final answer
   x = 20,496.70